I have 3 generations of chickens in my coop. 8, 2 year old girls and one 2 year old roo. 17, 10 week chickens and 20, 7 week old chickens. The 10 week old chickens keep dying I've lost about 9 so far in the past couple weeks. I find them in the nesting boxes, on the coop floor and on the dirt run floor. MY DH killed a big black snake last week. It was in the run and had a 10 week old chicken in its mouth. The DH thinks it's the heat but I'm not so sure. I have a tarp over a portion of the run, the coop is well ventilated and I have three waterers and a baby pool I fill daily. I wondering if my girls are snake bate? But why is it just the 10 week chicks and not the smaller ones? It's been in the high nineties and very humid. What do you think?